Any help is seriously appreciated on this issue. I cant find any answers anywhere but the issue im having is making me really upset because I cant figure it out. Here is my setup: Nikon D3100, 50mm prime lens, reverse mount ring, TT560 Neewer Speedlight flash. The first round of photos I took there were no half black photos but after i took it apart and put it back together this started. It doesnt make any sense at all and any ideas would greatly help me. I ruled out any issue with my lens because when it put it on the correct way with the speedlight it works just fine.